Improvement in middlings-purifiers



y e. Mr-LBANK.

MIDDLINGS-PURIFIER.

Patented Jan. 4,1876.j

WILnesses:

UNITED *STATES PATENT GEEICE.

GEORGE MILBANK, or.` GHI'LLICOTHE, MIssoURI.

IMPROVEMENT-IN"MlDDLlNGS-PURIFI'ERS.

Specification forming part of Letters Patent No. 17 1,833, dated January 4, 1876; application filed June 2, 1875.

' the latter having peculiarly-arran ged devices,

against which the middlings are caused to be beaten, while at the same time the currents or drafts are in varying direction, so that the air-currents-pass through and completely permeate the middlin gs, actin g upon the particles thereof, the heavier and better quality of middlings gravitatin g below, while the lighter andl impure stuit' is carried out at top.

Of the drawings, Figure l is av sectional elevation, excepting the blast -fan, which is shown as a front view. Fig. l2 is a side elevation. Fig. 3 is a top sectional plan on line A is a vertical spout. This has a feed-opening at a, Fig. 1, through which the middlings are fed, in order to be passed up said spout A. At b in the spout A are one or more stationary beaters, against which the middlings in the spout A are caused to strike by the current force, and in doing so separate the lighter and tilmy stuff from the better middlings. The middlings carried up the spout A next pass into the chamber B, which I term expansion-chamber, as will hereinafter appear. The expansion-chamber B I support at top of adischarge-hopper, C. (See Figs. l and 2.) The discharge-hopper C surrounds the feedspout A, as'shown in Figs. l and 2. In order that the pure and good middlings gravitatin g below can drop out of the expansion-chamber and into the hopper C, I leave clearancespaces o, surrounding the top end of the spout A. (See Fig. l.) It is through the passage c that the purified middlings drop into the hop per C upon an incline board, o, thence out of said hopper, through its discharge-opening at c2, into a receptacle. The opening at o? has a Hap-valve, c3, so that it is closed by the force of suction or blast, and will open by the force of the middlings passing ont of the hopper. As apparent, as soon as the currententers weakens the suction or blast.

or blast, and to impart to saine varying force and direction, I arrange within the chamber B a vertical shaft, D. secured to a cross-piece, (see Fig. l.) so as to supportsaid shaft statiox'iary. Further, for this purpose, near the lower end of the shaft D, 1 provideor forman enlarged addition at D. (See Fig. l.) The upward current is, by means of the part D, caused to spread away from the center and force iniddlings with it, which, being' lighter than the current, do not drop below. The divided currents carrying the middlings will next be passed in the direction of an inner projecting ange, d, (see Fig. 1,) against which said enrrents force the middlings to strike, and thus said flange acts as a separator ofthe middlin gs. Further, this ange also again divides the direction of the current force by causing saine to pass again in the direction to the center, and by means whereof the upward current-s are permitted to intersect and more fullyT permeate the middlings and pass through the same; which said action is a most eifective process for producing at varying stages the 4middlings to drop the better quality thereof. Near the top of the shaft l), this has a number ot' beaters, d', arranged crosswise, one above another, top and below each other. (See Fig. l.) Against these beaters the middlings carried upward are forced to strike, producing a shaking agitation, facilitating still further the purication ofthe iniddlings, while at the same time currents of air are by these beaters intersected, divided, and enabled the better to still further act upon the impurities contained, before the lighter middlings and impurities are passed out over the top of the eXpansion-chamber.- E is a top cl1amber,'into which theiinpurities and unseparated middlings pass when coming out of the expansion-chamber. Forming part of this chamber E is an inclined discharge-chamber. E. (See Figs. l and 3.) At e this chamber This has its lower end E has a discharge-opening covered by a Bap! valve. The valve opens to permitthe exit of the middlings, but closes by force of' the suction. Whatever middlings pass out of' the chamber E can be repassed through the purifier as before. The dirt, dust, impure stuff, and lighter particles are carried along with the current force into and down a vertical spout, F, arranged as shown in the figures. The spout F will have the suction-fan f in suitable casing f1, (see Fig. 1,) also a regulatingslide at fz.

As apparent, by such a construction and arrangement of parts, the machine can have the required upward current of air produced` siinply by means of the suction-fan fand its regulating-slide. At or near" the bottom of the spout A I can, however, arrange a blast-fan attachment, G, (see figures) and so at times can dispense with the suction-fan. Both suction and blast can also be used, especially Where great power of separation is required. e are openings in each side of chamber E', (see Fig. 1,) for the purpose of admitting an upward current of air to assist in purifying the middlings that come out of said chamber at e.

What I claim is- 1. A middlingslpurier consisting of the feed-spout A, having feed-opening at a, its

beaters b, the surrounding discharge-hopper C, having incline board c?, the expansionchamber B, having current-dividing shaft D,

with the part D' and beaters d', the ilange d, said parts being arranged with relation to discharge-chambers E E at top, and blast G at bottom, to operate in the manner substantially as herein set forth.

2. The combination of the feed-spout A, the discharge-hopper U, expansion-chamber B, its shaft D, beaters d', its ange d, the top chambers E E', and side spout F, and suction-fan, to operate in the manner substantially as herein set forth.

3. The combination of thefeed-spout A, discharge-hopper G, expansion-chamber B, con: taining `current-dividing parts and agitators, as shown 'and described, the top chamber E E', side spout F, said parts being constructed with relation to each other, and a blast, G,

and suction f, to operate substantially as set' forth. In testimony of said invention I have hereunto set my hand.

GEORGE MILBANK.

Witnesses E. W. DARLINGTON, RICHARD GLENKSEALE.

will 

